Has anyone come over from Windows Phone and still using MS services?

I am getting ready to jump from Windows Phone to the iPhone and I still plan on using all of my Microsoft services (Outlook, OneNote, One Drive, etc.)

I am wondering if there is anyone out there who has done this (or has attempted to do this) and how you made out? Has Microsoft made the transition as easy as it appears to be? From my perspective, there seems to be no downside.